UMTS: Alive and Well - 4G Americas

Table C.3. UE Search Space Summary.Search SpaceType Aggregation Level Size [in CCEs]Number ofPDCCHcandidatesDCI formats1 6 6UE-specific2 12 64 8 20, 1, 1A,1B, 1D, 2,2A8 16 2Common4 16 48 16 20, 1A, 1C, 3/3AAn example of predefined coding rates is shown in Table C.4 for a 5 MHz system with a control elementof size 36 subcarriers (for more details on the LTE DL control channel structure, see 3GPP TS 36.211,“Physical Channels and Modulation,” TS36.212 “Multiplexing and Channel Coding” and TS36.213“Physical Layer Procedures” on the 3GPP website: http://www.3gpp.org).www.3GAmericas.org February 2010 Page 166